Russia relies on companies including Exxon Mobil Corp., BP Plc, Halliburton Co. and Schlumberger Ltd. for the latest technology and expertise it needs to develop an estimated $7.58 trillion in oil and natural gas resources that sprawl across nine time zones.

U.S. stocks fell, with the Standard & Poor’s 500 Index headed for a one-month low, while Treasuries and the yen gained as the Federal Reserve said it would make further reductions in economic stimulus and as emerging-market currencies weakened. Gold and natural gas climbed.